Olacskin
On-line laser cleaning of skin-pass rolls (Olacskin)
Objectives
This project aims to demonstrate an innovative laser-based cleaning solution for zinc staining and zinc fouling, using an advanced online vision system for real-time defect detection and localization. Unlike traditional cleaning methods that rely on high-pressure water jets and detergents, which consume large volumes of water, this new approach opens new perspectives into ‘dry skin-pass rolling’. This solution also significantly reduces environmental impact, offering a more sustainable and eco-friendly skin-pass operation.
Description
Given its experience in AI-based image processing systems coupled to the OLM (On-Line Microscope), and high accuracy translating inspection systems in harsh environments, CRM is well positioned to develop such a roll monitoring solution.
The in-depth understanding and characterisation of zinc fouling and staining will be studied by Tata Steel, and the laser cleaning solution will be developed by P-Laser.
During skin pass rolling of hot dip galvanized products, two roll texturing problems are observed which negatively affect the steel strip surface quality: “zinc fouling” and “zinc staining”. The current solution to avoid these problems is a washing system which uses high volumes of water with detergent (soap) at high pressure with a significant ecological impact.
In-situ laser cleaning for skin-pass rolls is seen as a break-through solution as it enables: Dry skin-pass rolling and the elimination of the use of water and generation of waste water ; Controlled removal (cleaning) of zinc from skin-pass rolls to prevent zinc fouling and enable consistent surface texture transfer throughout rolling campaigns ; Use of an optical detection systems which, supported by artificial intelligence, detects zinc ; Staining on skin-pass rolls in an early stage where a dedicated laser cleaning action can remove staining before quality issues arise, enabling a zero-order defect approach.
In OLACSKIN RFCS-project, an innovative cleaning solution will be demonstrated based on a laser system, visual control system and cleaning algorithms.
Partners
Funding Bodies
